Phio Pharmaceuticals: Funding, Investors & Team (Oct 2026)
Phio Pharmaceuticals is a biotech company that focuses on using RNAi therapies in immuno-oncology. The company's INTASYL technology is a self-delivering platform for RNAi immuno-oncology treatments. This patented platform generates unique compounds designed to silence genes that help tumors evade the immune system.
Phio Pharmaceuticals has raised $25.1M across 6 funding rounds on record, the most recent an undisclosed round of $13.4M announced in Nov 2025.
That round is above the $8.1M median round size for Biotechnology companies tracked on FundedIQ over the last two years.
Phio Pharmaceuticals Company Profile and Key Stats
Latest funding round on record: Nov 2025.
Phio Pharmaceuticals Funding Rounds
Phio Pharmaceuticals raised $4.0M in an undisclosed round announced in Jun 2023.
6 months later, an undisclosed round of $2.8M was announced in Dec 2023.
5 months later, an undisclosed round of $620k was announced in May 2024.
2 months later, an undisclosed round of $3.1M was announced in Jul 2024.
5 months later, an undisclosed round of $1.2M was announced in Dec 2024.
11 months later, an undisclosed round of $13.4M was announced in Nov 2025.
Phio Pharmaceuticals Founders and Leadership Team
No contact details are on record for this team yet.
Phio Pharmaceuticals Funding Compared to Other Biotechnology Startups
Phio Pharmaceuticals' latest round of $13.4M is above the median round in Biotechnology. Medians cover the last 24 months of disclosed rounds.
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Phio Pharmaceuticals Funding FAQs
What does Phio Pharmaceuticals do?
Phio Pharmaceuticals is a biotech company that focuses on using RNAi therapies in immuno-oncology. The company's INTASYL technology is a self-delivering platform for RNAi immuno-oncology treatments. This patented platform generates unique compounds designed to silence genes that help tumors evade the immune system.
How much funding has Phio Pharmaceuticals raised?
Phio Pharmaceuticals has raised $25.1M across 6 rounds on record. The most recent is an undisclosed round of $13.4M announced in Nov 2025.
When did Phio Pharmaceuticals last raise funding?
Phio Pharmaceuticals' most recent funding round on record is an undisclosed round of $13.4M, announced in Nov 2025.
Who founded Phio Pharmaceuticals?
FundedIQ lists Craig Mello (Founder), Michael Czech (Founder) at Phio Pharmaceuticals.
Where is Phio Pharmaceuticals headquartered?
Phio Pharmaceuticals is based in Marlborough, Massachusetts, United States.
How many employees does Phio Pharmaceuticals have?
Phio Pharmaceuticals is in the 11-50 employee band.
How does Phio Pharmaceuticals' funding compare to other Biotechnology startups?
Phio Pharmaceuticals' latest round of $13.4M is above the $8.1M median round size for Biotechnology companies on FundedIQ across 4,185 tracked companies over the last two years.
About FundedIQ's Phio Pharmaceuticals Funding Data
FundedIQ tracks announced funding rounds and refreshes this profile every week. Round dates, stages and amounts are normalised to a single format, converted to US dollars, and de-duplicated: two records of the same round announced days apart are merged, and two genuinely different rounds are kept apart on the amounts they disclose. Amounts shown are the disclosed figures only — a round announced without a number is listed and excluded from the total rather than estimated.
Employee counts are reported bands, not exact headcounts. Founder and executive names carry the job title on record. Anything we do not hold for Phio Pharmaceuticals is left off this page rather than filled in.
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